沉闷

沉闷	chén mèn	oppressive (of weather) / heavy / depressed / not happy / (of sound) dull / muffled
沉	chén	to submerge / to immerse / to sink / to keep down / to lower / to drop / deep / profound / heavy
闷	mēn	stuffy / shut indoors / to smother / to cover tightly
闷	mèn	bored / depressed / melancholy / sealed / airtight / tightly closed